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[netCDF #BBA-614330]: Need Help

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  • Subject: [netCDF #BBA-614330]: Need Help
  • Date: Tue, 12 Oct 2010 14:35:52 -0600
Hi Tapash,

> Sir I am student of MCA, doing my project in NAL, India.
> 
> My project is to convert HDF to NetCDF but I have no idea on NetCDF.
> Can you please help me.

Rather than trying to read all the documentation, I recommend looking at last 
years'
netCDF Workshop:

  http://www.unidata.ucar.edu/software/netcdf/workshops/2009/

and looking through the list of Frequently Asked Questions:

  http://www.unidata.ucar.edu/software/netcdf/docs/faq.html

Note that the latest version of the C-based netCDF-4 (4.1.1) can read some HDF4 
and 
HDF5 data through the netCDF interface.  Also, netCDF-4 uses HDF5 as its 
storage layer.

However, a project to convert any HDF5 data to netCDF seems ambitious anf 
difficult,
because HDF5 has a different, more complex data model than the netCDF enhanced 
data 
model of netCDF-4.  For example, it would be difficult for netCDF to represent 
these
HDF5 features:

  - non-hierarchical Groups, for example A a parent of B and B a parent of A
  - user-defined primitive types, for example floating point values with 5 bits
    of exponent and 13 bits of mantissa
  - Reference data types, which store pointers to other data objects within a
    dataset

NetCDF supports most of the features of HDF5, but it is intended to be simpler 
to
use and understand, at the cost of not supporting some of the most complex (and
powerful) features of HDF5.

--Russ

ambitious
Russ Rew                                         UCAR Unidata Program
address@hidden                      http://www.unidata.ucar.edu



Ticket Details
===================
Ticket ID: BBA-614330
Department: Support netCDF
Priority: Normal
Status: Closed